Search for: capillary-imbibition
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    A new scaling relationship for water imbibition into the matrix: Considering fracture flow

    , Article Energy Sources, Part A: Recovery, Utilization and Environmental Effects ; Vol. 36, issue. 12 , Dec , 2010 , p. 1267-1275 ; ISSN: 15567036 Ardakany, M. S ; Shadizadeh, S. R ; Masihi, M ; Sharif University of Technology
    Spontaneous imbibition of water into the matrix is the most important mechanism for oil recovery in water wet fractured porous media. If the water is in contact with matrix and it is not flowing, the process is called static imbibition. The effect of rock and fluid properties, and boundary conditions on static imbibition are studied and formulated for scaling of the laboratory data to the reservoir scale. In reality, there is a continuous flow in a fracture; incorporating the effect of fracture flow into the scaling formulations is an unresolved issue in the modeling of the capillary imbibition recovery from the matrix. In this article, a new mathematical equation is developed to scale... 

    A neumerical method to investigate the effect of ultrasonic waves on capillary imbibition

    , Article 72nd European Association of Geoscientists and Engineers Conference and Exhibition 2010: A New Spring for Geoscience. Incorporating SPE EUROPEC 2010 ; Volume 5 , 2010 , Pages 3246-3250 ; 9781617386671 (ISBN) Keshavarzi, B ; Karimi, R ; Najafi, I ; Ghotbi, C ; Ghaedian, M ; Sharif University of Technology
    Society of Petroleum Engineers  2010
    A lot of laboratory experiments have been carried out to investigate each aspect of ultrasonic wave s role on fluid flow behavior through porous media. Despite all experimental works, little attention has been paid for modeling the ultrasonic wave influence on capillary imbibition, which is the main mechanism of production in fractured reservoirs. At this work the process of imbibition with and without applying ultrasonic waves is mathematically modeled by modification of piston-like model. In contrast to this model s assumption, in which mobility ratio is assumed to be constant, here permeability variation due to increase in water saturation is considered in numerical solution. To evaluate... 

    Experimental study of dynamic imbibition during water flooding of naturally fractured reservoirs

    , Article Journal of Petroleum Science and Engineering ; Volume 174 , 2019 , Pages 1-13 ; 09204105 (ISSN) Harimi, B ; Masihi, M ; Mirzaei Paiaman, A ; Hamidpour, E ; Sharif University of Technology
    Elsevier B.V  2019
    Capillary imbibition is an important recovery mechanism in naturally fractured reservoirs when water-filled fractures surround water-wet matrix blocks. A large amount of studies of imbibition process is simply total or partial immersion of nonwetting phase saturated rock in aqueous wetting phase. However, water advance in fractures during water flooding or water encroachment from an active aquifer introduces time dependent boundary conditions where invariant exposure of rock surface to water is not representative. In this work, a laboratory simulated matrix-fracture system was used to investigate different aspects of imbibition in the presence of fracture fluid flow (namely dynamic... 

    Experimental investigation of matrix wettability effects on water imbibition in fractured artificial porous media

    , Article Journal of Petroleum Science and Engineering ; Volume 86-87 , 2012 , Pages 165-171 ; 09204105 (ISSN) Rezaveisi, M ; Ayatollahi, S ; Rostami, B ; Sharif University of Technology
    Spontaneous water imbibition into the matrix blocks is known as the main mechanism for increased oil recovery from naturally fractured oil reservoirs. The rate of oil recovery and its ultimate value is mostly affected by wettability of the rocks and their pore structure. Oil viscosity also greatly influences the rate of oil recovery. A novel experimental model was utilized to study the imbibition mechanism under different wettability conditions. Matrix blocks made from different grain types and size distributions of glass beads were saturated with two different types of synthetic oil, to mimic the oil-saturated matrixes. The wetting characteristic of the models used in this study were...